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Resolving the extended stellar halos of nearby galaxies: the wide-field PISCeS survey

  • D. Crnojević (a1), D. J. Sand (a1), N. Caldwell (a2), P. Guhathakurta (a3), B. McLeod (a2), A. Seth (a4), J. D. Simon (a5), J. Strader (a6) and E. Toloba (a1) (a3)...

Abstract

In the wide-field Panoramic Imaging Survey of Centaurus and Sculptor (PISCeS), we investigate the resolved stellar halos of two nearby galaxies (the elliptical Centaurus A and the spiral Sculptor, D ~ 3.7 Mpc) out to a projected galactocentric radius of 150 kpc with Magellan/Megacam. The survey has led to the discovery of ~20 faint satellites to date, plus prominent streams and substructures in two environments that are substantially different from the Local Group, i.e. the Centaurus A group dominated by an elliptical and the loose Sculptor group of galaxies. These discoveries clearly attest to the importance of past and ongoing accretion processes in shaping the halos of these nearby galaxies, and provide the first census of their satellite systems down to an unprecedented MV < −8. The detailed characterization of the stellar content, shape and gradients in the extended halos of Sculptor, Centaurus A, and their dwarf satellites provides key constraints on theoretical models of galaxy formation and evolution.

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Footnotes

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This paper includes data gathered with the 6.5 meter Magellan Telescopes located at Las Campanas Observatory, Chile.

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References

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Atkinson, A. M., Abraham, R. G., & Ferguson, A. M. N. 2013, ApJ, 765, 28
Belokurov, V., Zucker, D. B., Evans, N. W., et al. 2006, ApJL, 647, L111
Boylan-Kolchin, M., Bullock, J. S., & Kaplinghat, M. 2012, MNRAS, 422, 1203
Chiboucas, K., Jacobs, B. A., Tully, R. B., & Karachentsev, I. D. 2013, AJ, 146, 126
Crnojević, D., Sand, D. J., Caldwell, N., et al. 2014, ApJL, 795, L35
Crnojević, D., et al. 2016, ApJ in press, ArXiv e-prints, arXiv:1512.05366
Dotter, A., Chaboyer, B., Jevremović, D., et al. 2008, ApJS, 178, 89
Duc, P.-A., Cuillandre, J.-C., Karabal, E., et al. 2015, MNRAS, 446, 120
Gilbert, K. M., Guhathakurta, P., Beaton, R. L., et al. 2012, ApJ, 760, 76
Ibata, R., Irwin, M., Lewis, G. F., & Stolte, A. 2001, ApJL, 547, L133
Karachentsev, I. D. 2005, AJ, 129, 178
Martínez-Delgado, D., Gabany, R. J., Crawford, K., et al. 2010, AJ, 140, 962
McConnachie, A. W., Irwin, M. J., Ibata, R. A., et al. 2009, Nature, 461, 66
McLeod, B., Geary, J., Conroy, M., et al. 2015, PASP, 127, 366
Merritt, A., van Dokkum, P., & Abraham, R. 2014, ApJL, 787, L37
Moore, B., Ghigna, S., Governato, F., et al. 1999, ApJL, 524, L19
Monachesi, A., Bell, E. F., Radburn-Smith, D. J., et al. 2016, MNRAS, 457, 1419
Okamoto, S., Arimoto, N., Ferguson, A. M. N., et al. 2015, ApJL, 809, L1
Sand, D. J., Crnojević, D., Strader, J., et al. 2014, ApJL, 793, L7
Stetson, P. B. 1987, PASP, 99, 191
Stetson, P. B. 1994, PASP, 106, 250
Tal, T., van Dokkum, P. G., Nelan, J., & Bezanson, R. 2009, AJ, 138, 1417
Toloba, E., et al. 2016b, submitted
Toloba, E., Sand, D. J., Spekkens, K., et al. 2016a, ApJ, 816, L5
Woodley, K. A., Harris, W. E., Beasley, M. A., et al. 2007, AJ, 134, 494
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Keywords

Resolving the extended stellar halos of nearby galaxies: the wide-field PISCeS survey

  • D. Crnojević (a1), D. J. Sand (a1), N. Caldwell (a2), P. Guhathakurta (a3), B. McLeod (a2), A. Seth (a4), J. D. Simon (a5), J. Strader (a6) and E. Toloba (a1) (a3)...

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